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+// Exa 8.2
+// To calculate the output of the encoder.
+
+clc;
+clear all;
+
+K=4; //constraint length
+r=1/2; //code rate(n/k)
+x=poly(0,"x");//Defining x as a ploynomial variable
+G1=1+x^2+x^3;
+G2=1+x+x^2+x^3;
+in=[1 0 1 1 1];//input(first bit first)
+
+//solution
+//with reference to Fig 8.9 on page no 239
+g1=[1 0 1 1]; //converting from G1 polynomial to bit form
+g2=[1 1 1 1];////converting from G2 polynomial to bit form
+x1=round(convol(g1,in));
+x2=round(convol(g2,in));
+V1=modulo(x1,2);
+V2=modulo(x2,2);
+disp("Multiplexing the V1 and V2 to get required output sequence as ");
+ a=5;
+for i= 1:5
+   printf('%d%d',V2(a),V1(a));
+   a=a-1;
+  
+end
+